01243nam0 22003373i 450 CFI004590120231121125430.0IT81-10535 20140317d1981 ||||0itac50 baitaitz01i xxxe z01n˜Il œtempo del telefonol'insufficienza di EuclideLetizia Fabi De LauraRomaBulzoni1981238 p., \8! c. di tav.ill.21 cm.Biblioteca di cultura206001CFI00001562001 Biblioteca di cultura206TelefoniaStoriaFIRRMLC383604IServizi telefoniciStoriaFIRRMLC383605ITelefoniaAspetti socialiFIRRMLC411340I384.6Telefonia21Fabi De Laura, LetiziaCFIV0293240701440527ITIT-0120140317IT-FR0017 Biblioteca umanistica Giorgio ApreaFR0017 CFI0045901Biblioteca umanistica Giorgio Aprea 52MAG 6/751 52MAG0000131735 VMN RS A 2014031720140317 52Tempo del telefono3604609UNICAS01512nam 2200349 450 991013526640332120231208083633.00-7381-0563-510.1109/IEEESTD.1979.81714(CKB)3780000000092172(NjHacI)993780000000092172(EXLCZ)99378000000009217220231208d1979 uy 0engur|||||||||||txtrdacontentcrdamediacrrdacarrierANSI/IEEE Std 661-1979 IEEE standard method for determining objective loudness ratings of telephone connections /Institute of Electrical and Electronics EngineersPiscataway, New Jersey :IEEE,1979.1 online resource (20 pages)To describe a practical and reproducible method of determining the loudness ratings of telephone connections. Loudness ratings may be measured directly using appropriate test instruments and facilities, as specified in this standard, or may be computed using the amplitude-frequency characteristic of the connection measured in accordance with IEEE Std 269-1971.ANSI/IEEE Std 661-1979: IEEE Standard Method for Determining Objective Loudness Ratings of Telephone ConnectionsTelephone systemsTelephone systems.651.73NjHacINjHaclDOCUMENT9910135266403321ANSI2072434UNINA